Amazon India — moto g5s plus charging cable

Website:

www.amazon.in

I ordered above mentioned charging cable from amazon. But due to some reasons i cancelled it. I received my amount which i paid from amazon pay wallet but rest of the amount which i paid from my debit card is not refunded yet. When asked to their customer service they say your transaction was pending at that time they gave me reference no and said visit bank you will get your refund. Banks say you should look upon your online transactions. When we have to order something do amazon accepts pending transactions? Then why they expect that we should go and talk to bank which is not involved between us. Amazon trying to bluff their customers nowadays everytime i contact customer service they talk for a while and leave the conversation. Is it your helping nature? You have disrespected someones feeling and i need answer for it.